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Search: Posts Made By: Luke
Forum: The Garage 08-21-2014, 06:10 PM
Replies: 4,140
Views: 546,991
Posted By Luke
I used some 4047 rod on a casting once, it worked...

I used some 4047 rod on a casting once, it worked great. It was a pretty nice casting though, so any rod probably would have worked ok.

I was persuaded to try that rod by this:
...
Forum: Pacific Northwet - Where it's green. And wet. 08-20-2014, 03:12 PM
Replies: 4,366
Views: 314,847
Posted By Luke
Welcome. The local dirt bike parks are the...

Welcome.

The local dirt bike parks are the Tillamook State Forest which is about 45 min west of Beaverton on Hwy 6. Biped and I are going there Saturday. Feel free to join us. There are a lot of...
Forum: Pacific Northwet - Where it's green. And wet. 08-20-2014, 02:52 PM
Replies: 4,366
Views: 314,847
Posted By Luke
Sounds good. I assume trails are TBD depending...

Sounds good. I assume trails are TBD depending on who else shows up?
Forum: The Garage 08-20-2014, 02:34 PM
Replies: 46
Views: 2,471
Posted By Luke
Regarding the damping math, let me rephrase it a...

Regarding the damping math, let me rephrase it a little.

Damping Force = Damping Coefficient * Velocity

Linear damping is where the Damping Coefficient is constant.
Digressive damping is...
Forum: Pacific Northwet - Where it's green. And wet. 08-20-2014, 09:08 AM
Replies: 5
Views: 565
Posted By Luke
I kept reading this as 'I DON'T know why'. And...

I kept reading this as 'I DON'T know why'. And I'm thinking of a lot of really good reasons why not. Two of them were in the rest of your post. :lol3



I use a mountain bike shock pump. ...
Forum: The Garage 08-19-2014, 09:53 PM
Replies: 46
Views: 2,471
Posted By Luke
The only forks I've seen with damping that was...

The only forks I've seen with damping that was position sensitive were really old damper rod forks from the 70s. The cartridge forks that I've seen all had damping that was totally independent of...
Forum: Thumpers 08-19-2014, 01:59 PM
Replies: 7
Views: 418
Posted By Luke
You can put the jt part number into their catalog...

You can put the jt part number into their catalog and it will tell you which bikes it's used on.


http://www.jtsprockets.com/fileadmin/res/jtlogo.jpg (http://www.jtsprockets.com/)

...
Forum: The Garage 08-19-2014, 01:50 PM
Replies: 46
Views: 2,471
Posted By Luke
Oh yeah, back to your actual problem. I'd...

Oh yeah, back to your actual problem. I'd start by putting in lighter fork oil. It's a cheap and easy test. It will have the biggest effect on your low speed damping, which is the first place...
Forum: The Garage 08-19-2014, 01:35 PM
Replies: 46
Views: 2,471
Posted By Luke
The sag numbers I posted above do give an exact...

The sag numbers I posted above do give an exact spring rate. The numbers were created for tuning 2-300# dirt bikes so the rate may or may not be correct. However they are also used for the big...
Forum: Pacific Northwet - Where it's green. And wet. 08-19-2014, 10:24 AM
Replies: 4,366
Views: 314,847
Posted By Luke
In.

In.
Forum: Some Assembly Required 08-18-2014, 09:12 PM
Replies: 31
Views: 2,112
Posted By Luke
I don't know of any 2-stroke that's air cooled...

I don't know of any 2-stroke that's air cooled and e-start. There are some rope start quad motors though :D. If you want to go 4-stroke there are lots of little chinese crate motors available, many...
Forum: The Garage 08-17-2014, 09:06 PM
Replies: 46
Views: 2,471
Posted By Luke
The sag % numbers that I listed in my post above...

The sag % numbers that I listed in my post above are based off of what I have heard from several professional suspension tuners. I have never heard an explanation as to why, they just seem to be...
Forum: The Garage 08-17-2014, 01:24 PM
Replies: 46
Views: 2,471
Posted By Luke
I'm slowly figuring things out as I tune...

I'm slowly figuring things out as I tune different bikes and am on to a basic method.

Rear sag is set to 10% unloaded, 33% loaded. Front sag is set to 10% unloaded, 25% loaded. This defines...
Forum: Thumpers 08-07-2014, 07:05 PM
Replies: 8,232
Views: 1,597,714
Posted By Luke
I think it was more that some gears had different...

I think it was more that some gears had different numbers of dogs. I have a TRX transmission sitting around you can have if you haven't already bought one. Sorry, the XR transmission is in the bike....
Forum: Thumpers 08-06-2014, 10:49 PM
Replies: 8,232
Views: 1,597,714
Posted By Luke
I tried doing this when I was building an XR/TRX...

I tried doing this when I was building an XR/TRX hybrid and the best set of gears wouldn't work because the dogs don't match. There was some combination that would have worked, but I didn't use it. ...
Forum: The Garage 07-30-2014, 11:46 AM
Replies: 12
Views: 906
Posted By Luke
Alcohol. Pour a cup or two in the tank...

Alcohol.


Pour a cup or two in the tank and slosh it around to mix with the gas, then pour it out and rinse with water. The gas-alcohol mix is water soluble so it rinses out really well. I've...
Forum: Pacific Northwet - Where it's green. And wet. 07-24-2014, 06:52 PM
Replies: 4,366
Views: 314,847
Posted By Luke
Yes, I called and checked. If you want to car...

Yes, I called and checked. If you want to car pool let me know, I PMed my contact info.
Forum: Some Assembly Required 07-22-2014, 06:27 PM
Replies: 134
Views: 22,409
Posted By Luke
Ye-haw! :lol3 I got the tuning for whoops...

Ye-haw! :lol3

I got the tuning for whoops right on one bike, half by accident. The rest feel about how yours looks. I should probably tear it down and see what's right about it.
Forum: Pacific Northwet - Where it's green. And wet. 07-22-2014, 03:00 PM
Replies: 4,366
Views: 314,847
Posted By Luke
PBS, huh? You guys really liked the...

PBS, huh?

You guys really liked the sidehills this year. :lol3


http://drduck.smugmug.com/Motorcycles/Tillamook-Dirt-Rides/i-vHs2bXK/0/X2/ae40-X2.jpg



That was a nice course. Except...
Forum: Pacific Northwet - Where it's green. And wet. 07-22-2014, 02:24 PM
Replies: 4,366
Views: 314,847
Posted By Luke
Out of curiosity, what were the expert splits? ...

Out of curiosity, what were the expert splits? I saw the one just after Benny Hill (Piggyback, I think) and another at the bottom half of Pumpkin Patch. I remember seeing others, but not where...
Forum: Pacific Northwet - Where it's green. And wet. 07-22-2014, 01:39 PM
Replies: 4,366
Views: 314,847
Posted By Luke
The default is that OHV trails all close during...

The default is that OHV trails all close during fire season.
Most designated OHV trails in TSF are open by a waiver. There's a map posted at the staging areas showing what's open. All the ...
Forum: Pacific Northwet - Where it's green. And wet. 07-22-2014, 01:31 PM
Replies: 4,366
Views: 314,847
Posted By Luke
For non-leisurely track riders, Twinduro and I...

For non-leisurely track riders, Twinduro and I are meeting at Riverdale MX (http://www.riverdaleraceway.com/node/104) this Saturday for a practice day on their vintage track. The owner said the...
Forum: Pacific Northwet - Where it's green. And wet. 07-22-2014, 01:15 PM
Replies: 4,366
Views: 314,847
Posted By Luke
It's been open in it's current incarnation for a...

It's been open in it's current incarnation for a couple of months now. Never been in, but should check it out.
Forum: Pacific Northwet - Where it's green. And wet. 07-17-2014, 03:08 PM
Replies: 21,432
Views: 1,574,939
Posted By Luke
:wave Make that at least two FFs.

:wave


Make that at least two FFs.
Forum: Thumpers 07-14-2014, 02:53 PM
Replies: 9
Views: 511
Posted By Luke
Weld it. It's an easy job. The hardest part is...

Weld it. It's an easy job. The hardest part is cleaning the old gasket off.


Pull the cover, remove the crank seal and gasket scraps, then clean it out with alcohol. Sand the paint off 1"...
Forum: Some Assembly Required 07-08-2014, 12:14 AM
Replies: 54
Views: 11,596
Posted By Luke
Sorry to hear it, that YZ frame looks like it's...

Sorry to hear it, that YZ frame looks like it's come a long way.

I'll be riding with a guy with an XR600 in a couple of days, any measurements you want? I have an XR400 if you want measurements of...
Forum: Pacific Northwet - Where it's green. And wet. 07-02-2014, 08:42 PM
Replies: 9
Views: 626
Posted By Luke
I don't know of anything good that's really...

I don't know of anything good that's really close. Everything's a half hour to 45 mins away. (or very private)
A few options, from least to most challenging:

Take Hwy 10 SW to Bald Mtn. There...
Forum: The Garage 06-30-2014, 10:02 PM
Replies: 14
Views: 1,074
Posted By Luke
Thanks, I guess a number stamped on it would be...

Thanks, I guess a number stamped on it would be too easy :lol3

I've done a little welding on thick close fittng parts, and it often cracks. Running back over the cracked weld a second time seems...
Forum: The Garage 06-30-2014, 03:03 PM
Replies: 14
Views: 1,074
Posted By Luke
What kind of filler rod is it?

What kind of filler rod is it?
Forum: Pacific Northwet - Where it's green. And wet. 06-27-2014, 09:53 AM
Replies: 11
Views: 886
Posted By Luke
Evidence suggests no, out of staters need it too....

Evidence suggests no, out of staters need it too.

Anyone under 16 also needs to be certified.
http://www.omraoffroad.com/OMRA-YSEP/registration.html

Bend is district 5, deschutes county. If...
Forum: Pacific Northwet - Where it's green. And wet. 05-30-2014, 08:42 PM
Replies: 4,366
Views: 314,847
Posted By Luke
Ok, how about the Binns hill staging area...

Ok, how about the Binns hill staging area (http://www.co.hood-river.or.us/index.asp?Type=B_BASIC&SEC={0D9E9729-161D-4FA2-801F-8735B547071D}) at 10?

Post Flats is a little closer but the main...
Forum: Pacific Northwet - Where it's green. And wet. 05-30-2014, 08:35 PM
Replies: 74
Views: 4,082
Posted By Luke
No real advice here, but I'll follow this to see...

No real advice here, but I'll follow this to see how it turns out. Another dr owner here has the same problem -detonation with no obvious cause- on a bike that's stock +TM40 carb.
Forum: Pacific Northwet - Where it's green. And wet. 05-30-2014, 01:38 PM
Replies: 22
Views: 1,062
Posted By Luke
+1 Tow the bike to the paved road /...

+1



Tow the bike to the paved road / nice gravel road / place with cell service, then call your towing service / friend with a pickup.
Forum: Pacific Northwet - Where it's green. And wet. 05-30-2014, 01:27 PM
Replies: 4,366
Views: 314,847
Posted By Luke
Well so far, I'm riding somewhere. Thats about...

Well so far, I'm riding somewhere. Thats about the extent of the plans. Oh yeah, I have no plate and a top speed of 48 (indicated) :lol3

I'd like to get in 3 or 4 hours of riding, but I'm not...
Forum: Pacific Northwet - Where it's green. And wet. 05-30-2014, 01:01 PM
Replies: 22
Views: 1,062
Posted By Luke
I'm tempted to agree, but if I still had a BMW...

I'm tempted to agree, but if I still had a BMW I'd get towing insurance too.
Forum: Pacific Northwet - Where it's green. And wet. 05-29-2014, 08:27 PM
Replies: 4,366
Views: 314,847
Posted By Luke
So who's up for a dirt ride this weekend? It's...

So who's up for a dirt ride this weekend? It's going to be perfect weather. I can go either day.
Forum: Racing 05-27-2014, 04:24 PM
Replies: 2,072
Views: 384,392
Posted By Luke
I have a Trailtech bar in the 'Motorcycle low...

I have a Trailtech bar in the 'Motorcycle low bend' and really like it; there's not much rise to it so I had to add a little extra to my usual risers. There's lots of room for controls. ...
Forum: Pacific Northwet - Where it's green. And wet. 05-26-2014, 09:31 AM
Replies: 4,366
Views: 314,847
Posted By Luke
Very, very nice. It's the replacement for the...

Very, very nice. It's the replacement for the good old Stick-in-the-nose.


Alex and I got denied (again) on my Tour de Trask. This was the consolation prize.
Forum: Pacific Northwet - Where it's green. And wet. 05-25-2014, 10:49 PM
Replies: 4,366
Views: 314,847
Posted By Luke
bump ...

bump




http://drduck.smugmug.com/Motorcycles/Tillamook-Dirt-Rides/i-vHs2bXK/0/X2/ae40-X2.jpg
Forum: Thumpers 05-23-2014, 08:49 PM
Replies: 8,232
Views: 1,597,714
Posted By Luke
The trailtech has worked fine for me ever since I...

The trailtech has worked fine for me ever since I rubber mounted it. A couple of grommets, washers, bolts, and spacers from the hardware store was all it took.
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